From 5dd702763ae0e112332a4447171adbed51aeee3d Mon Sep 17 00:00:00 2001
From: Jake Goulding <jake.goulding@gmail.com>
Date: Fri, 18 Mar 2022 20:31:53 -0400
Subject: [PATCH] impl From<&[T; N]> and From<&mut [T; N]> for Vec<T>

---
 library/alloc/src/vec/mod.rs | 42 ++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/library/alloc/src/vec/mod.rs b/library/alloc/src/vec/mod.rs
index 5131168db0c..c63f9123022 100644
--- a/library/alloc/src/vec/mod.rs
+++ b/library/alloc/src/vec/mod.rs
@@ -2929,6 +2929,48 @@ impl<T, const N: usize> From<[T; N]> for Vec<T> {
     }
 }
 
+#[cfg(not(no_global_oom_handling))]
+#[stable(feature = "vec_from_array_ref", since = "1.61.0")]
+impl<T: Clone, const N: usize> From<&[T; N]> for Vec<T> {
+    /// Allocate a `Vec<T>` and fill it by cloning `s`'s items.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// assert_eq!(Vec::from(b"raw"), vec![b'r', b'a', b'w']);
+    /// ```
+    #[cfg(not(test))]
+    fn from(s: &[T; N]) -> Vec<T> {
+        s.to_vec()
+    }
+
+    #[cfg(test)]
+    fn from(s: &[T; N]) -> Vec<T> {
+        crate::slice::to_vec(s, Global)
+    }
+}
+
+#[cfg(not(no_global_oom_handling))]
+#[stable(feature = "vec_from_array_ref", since = "1.61.0")]
+impl<T: Clone, const N: usize> From<&mut [T; N]> for Vec<T> {
+    /// Allocate a `Vec<T>` and fill it by cloning `s`'s items.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// assert_eq!(Vec::from(&mut [1, 2, 3]), vec![1, 2, 3]);
+    /// ```
+    #[cfg(not(test))]
+    fn from(s: &mut [T; N]) -> Vec<T> {
+        s.to_vec()
+    }
+
+    #[cfg(test)]
+    fn from(s: &mut [T; N]) -> Vec<T> {
+        crate::slice::to_vec(s, Global)
+    }
+}
+
 #[stable(feature = "vec_from_cow_slice", since = "1.14.0")]
 impl<'a, T> From<Cow<'a, [T]>> for Vec<T>
 where